I know, Doc, but I had to come.
3 seconds sound clip from the Back to the Future Part III movie soundboard.
You can hear this line at 00:35:17.290 in the DVD version of the movie.
Quote context
[...]
- Well, that's your problem, Tannen.
- Doc!
- Marty, I gave you explicit instructions not to come here, but to go directly back to 1985.
- I know, Doc, but I had to come.
- But it's good to see you, Marty.
- What idiot dressed you in that outfit?
- You did.
- Shot in the back by Buford Tannen over a matter of $80, September 7? That's this Monday!
- Now I wish I'd paid him off.
[...]